<s>
Ninja	B-Application
Spirit	I-Application
,	O
known	O
in	O
Japan	O
as	O
,	O
is	O
a	O
1988	O
platform	O
game	O
developed	O
and	O
released	O
in	O
arcades	O
by	O
Irem	O
.	O
</s>
<s>
The	O
ninja	B-Application
is	O
always	O
armed	O
with	O
the	O
katana	B-Operating_System
named	O
Muramasa	O
(	O
meaning	O
Righteous	O
Cloud	O
)	O
,	O
which	O
can	O
be	O
fluidly	O
used	O
to	O
attack	O
in	O
all	O
directions	O
.	O
</s>
<s>
There	O
are	O
also	O
several	O
power-up	O
items	O
,	O
such	O
as	O
one	O
unleashing	O
multiple	O
ninja	B-Application
ghosts	O
to	O
assist	O
the	O
player	O
.	O
</s>
<s>
The	O
game	O
's	O
hero	O
,	O
,	O
is	O
a	O
young	O
ninja	B-Application
who	O
lost	O
his	O
father	O
to	O
a	O
mysterious	O
half-man	O
half-beast	O
creature	O
.	O
</s>
<s>
The	O
plot	O
of	O
Ninja	B-Application
Spirit	I-Application
is	O
based	O
on	O
the	O
quest	O
of	O
his	O
way	O
to	O
avenge	O
his	O
father	O
in	O
an	O
alternative	O
feudal	O
Japan	O
.	O
</s>
<s>
The	O
most	O
popular	O
port	O
is	O
the	O
TurboGrafx-16	B-General_Concept
format	O
which	O
includes	O
two	O
modes	O
:	O
the	O
PC	B-General_Concept
Engine	I-General_Concept
mode	O
which	O
players	O
lose	O
one	O
life	O
only	O
if	O
all	O
5	O
energy	O
points	O
are	O
used	O
up	O
(	O
certain	O
enemies	O
can	O
kill	O
Tsukikage	O
with	O
one	O
hit	O
)	O
,	O
and	O
the	O
Arcade	O
mode	O
,	O
which	O
is	O
a	O
more	O
challenging	O
mode	O
where	O
any	O
attack	O
are	O
grounds	O
for	O
players	O
to	O
lose	O
one	O
ninja	B-Application
instantly	O
.	O
</s>
<s>
That	O
version	O
was	O
ported	O
to	O
the	B-Operating_System
Nintendo	I-Operating_System
Wii	I-Operating_System
's	O
Virtual	B-Application
Console	I-Application
on	O
14	O
May	O
2007	O
,	O
was	O
delisted	O
on	O
30	O
March	O
2012	O
and	O
was	O
available	O
again	O
on	O
17	O
September	O
2013	O
in	O
Japan	O
and	O
on	O
19	O
September	O
2013	O
in	O
North	O
America	O
and	O
Europe	O
.	O
</s>
<s>
The	O
same	O
version	O
was	O
re-released	O
on	O
the	B-Operating_System
Nintendo	I-Operating_System
Wii	I-Operating_System
U	O
's	O
Virtual	B-Application
Console	I-Application
on	O
14	O
January	O
2015	O
in	O
Japan	O
,	O
27	O
July	O
2017	O
in	O
North	O
America	O
and	O
10	O
August	O
2017	O
in	O
Europe	O
.	O
</s>
<s>
In	O
Japan	O
,	O
Game	O
Machine	O
listed	O
Ninja	B-Application
Spirit	I-Application
on	O
their	O
September	O
1	O
,	O
1988	O
issue	O
as	O
being	O
the	O
fifth	O
most-successful	O
table	O
arcade	O
unit	O
of	O
the	O
month	O
,	O
outperforming	O
titles	O
like	O
The	B-Application
Main	I-Application
Event	I-Application
.	O
</s>
<s>
In	O
Issue	O
15	O
of	O
Electronic	O
Gaming	O
Monthly	O
,	O
both	O
Ninja	B-Application
Spirit	I-Application
and	O
Ys	B-Application
Book	I-Application
I	I-Application
&	I-Application
II	I-Application
were	O
the	O
first	O
games	O
to	O
receive	O
a	O
perfect	O
10	O
in	O
the	O
magazine	O
's	O
history	O
.	O
</s>
<s>
In	O
2010	O
,	O
CraveOnline	O
featured	O
this	O
version	O
in	O
the	O
article	O
Top	O
10	O
Ninja	B-Application
Games	O
Of	O
All	O
Time	O
,	O
commenting	O
:	O
"	O
Ninja	B-Application
Spirit	I-Application
for	O
the	O
TurboGrafx-16	B-General_Concept
was	O
a	O
lot	O
like	O
“	O
Legend	B-Application
of	I-Application
Kage	I-Application
”	O
on	O
the	O
NES	O
,	O
except	O
better	O
in	O
every	O
way	O
...	O
both	O
challenging	O
and	O
sort	O
of	O
relaxing	O
at	O
the	O
same	O
time.	O
"	O
</s>
<s>
Ninja	B-Application
Spirit	I-Application
later	O
appeared	O
in	O
the	O
Japan-only	O
Game	B-Device
Boy	I-Device
title	O
,	O
Shuyaku	B-Application
Sentai	I-Application
Irem	I-Application
Fighter	I-Application
along	O
with	O
other	O
characters	O
from	O
the	O
game	O
,	O
as	O
well	O
as	O
characters	O
from	O
three	O
other	O
Irem	O
franchises	O
:	O
R-Type	B-Application
,	O
Mr.	B-Application
Heli	I-Application
,	O
and	O
Hammerin	B-Application
 '	I-Application
Harry	I-Application
.	O
</s>
